Laser machining apparatus and laser machining method

Patent metadata

Field	Value
Publication number	US-2019111517-A1
Application number	US-201716089878-A
Country	US
Kind code	A1
Filing date	Mar 30, 2017
Priority date	Mar 31, 2016
Publication date	Apr 18, 2019
Grant date	—

Abstract

A laser machining device includes a plurality of optical fibers and a collimator lens arranged in parallel along a supply nozzle for supplying a molten material, and a laser beam projected from the optical fiber is applied onto an axis between a tip of the supply nozzle and a build-up welding spot.

First claim

1 . A laser machining method comprising: an optical fiber; a condenser lens; and a supply nozzle for supplying a molten material, wherein the supply nozzle is arranged so as to penetrate the condenser lens, and the molten material supplied from the supply nozzle is irradiated with a laser beam from the optical fiber on an axis of the condenser lens or on a periphery of the axis or on an axis of the supply nozzle or on a periphery of the axis.

2 . A laser machining method comprising: a plurality of optical fibers; a condenser lens condensing a laser beam of each of the optical fibers; and a supply nozzle for supplying a molten material by injection, wherein the supply nozzle is arranged so as to penetrate the condenser lens, the optical fibers are arranged on the periphery of the supply nozzle, and the molten material supplied from the supply nozzle is irradiated with the laser beam from the optical fiber at least on an axis between a nozzle tip port and a welding spot on an axis of the condenser lens or on a periphery of the axis.

3 . The laser machining method according to claim 1 , wherein the condenser lens through which the supply nozzle penetrates is arranged at the center, the optical fibers are arranged on the periphery of the supply nozzle, and the molten material supplied from the supply nozzle is irradiated from the periphery of the molten material with the laser beam from the optical fibers.

4 . The laser machining method according to claim 1 , wherein the periphery of the welding spot is irradiated at the same time as the irradiation on the axis by applying of the laser beams from the plurality of optical fibers, or the periphery of the welding spot is irradiated before the irradiation on the axis.

5 . The laser machining method according to claim 1 , wherein the distance of the molten material discharged from tip port of the supply nozzle from the nozzle tip port to the welding spot is changed by moving the condenser lens which the supply nozzle penetrates, or by moving the supply nozzle penetrating the condenser lens.

6 . The laser machining method according to claim 1 , wherein at least one of a wavelength, a condensing angle, a condensing diameter, an irradiation amount to the molten material or an irradiation amount to the welding spot of the laser beam is adjusted.

7 . The laser machining method according to claim 1 , wherein the supply nozzle comprises converging gas supply means, and the converging gas supply means injects the converging gas from the side of the supply nozzle so that the molten material is converged.

8 . A laser machining apparatus comprising: an optical fiber; a condenser lens; and a supply nozzle for supplying a molten material, wherein the supply nozzle is arranged so as to penetrate the condenser lens, and the molten material supplied from the supply nozzle is irradiated with a laser beam on an axis of the condenser lens or on a periphery of the axis or on an axis of the supply nozzle or on a periphery of the axis.

9 . The laser machining apparatus according to claim 8 , wherein the condenser lens through which the supply nozzle penetrates is arranged at the center, the optical fibers are arranged on the periphery of the supply nozzle, and the molten material supplied from the supply nozzle is irradiated from the periphery of the molten material with the laser beam from the optical fibers.

10 . The laser machining apparatus according to claim 8 , wherein the plurality of optical fibers comprises a control member for driving control in parallel with respect to the supply nozzle or comprises a control member for driving control with respect to a radial direction of the condenser lens.

11 . The laser machining apparatus according to claim 8 , wherein the laser machining apparatus comprises a collimator lens through which the laser beam from the optical fibers, the collimator lens comprises a control member for driving control in parallel with respect to the supply nozzle or comprises a control member for driving control with respect to the radial direction of the condenser lens.

12 . The laser machining apparatus according to claim 8 , characterized by further comprising a control member for moving the condenser lens which the supply nozzle penetrates or by comprising a control member for moving the supply nozzle penetrating the condenser lens.

13 . The laser machining apparatus according to claim 8 , wherein the condenser lens is configured by dividing the single condenser lens into a plurality, and a movable region in which the supply nozzle can be moved is provided at the center of the condenser lens.

14 . The laser machining apparatus according to claim 8 , wherein, in the supply nozzle constituted by an inner pipe nozzle for supplying the molten material and an outer pipe nozzle disposed on an outer periphery of the inner pipe nozzle, a channel for the converging gas is provided between the inner pipe nozzle and the outer pipe nozzle.

15 . The laser machining apparatus according to claim 8 , wherein the supply nozzle comprises the converging gas supply means and supply nozzle injection control means for controlling at least any one of an injection amount, an injection speed, and an injection range of the molten material, and the converging gas supply means comprises converging gas injection control means for controlling at least any one of an injection amount, an injection speed, and an injection range of the converging gas.

16 . The laser machining apparatus according to claim 8 , wherein the supply nozzle is made of a laser beam transmissive material and transmits the laser beam through the molten material or a converging gas.

Assignees

• Muratani Machine Inc
• Ishikawa Prefecture
• Univ Osaka

Inventors

• Muratani Sotohiro
• Tsukamoto Masahiro
• Funada Yoshinori
• Yamashita Yorihiro

Classifications

• B23K26/064 Primary

  by means of optical elements, e.g. lenses, mirrors or prisms · CPC title

• B23K26/342

  Build-up welding · CPC title

• B23K26/1476

  Features inside the nozzle for feeding the fluid stream through the nozzle · CPC title

• B23K26/144 Primary

  the fluid stream containing particles, e.g. powder · CPC title

• B23K26/146

  the fluid stream containing a liquid · CPC title